CRC806-Database Data Feed (RSS) Data feed of the CRC806-Database We Descended the Ivindo: Baka Migration and Mobility to Northeastern Gabon from the 1960s to Today This article provides an account of the migratory history from the 1960s until today of the Baka groups now living along the River Ivindo in northeastern Gabon. Important sites and routes in the migratory processes of these Baka, their clan members, and ancestors are documented and causes for staying or leaving, past and present are detailed. The historical analysis shows there to be three principal factors in Baka migrations and mobilities: firstly, toma, following family or friends; secondly, the type and quality of the inter-ethnic relations; and, thirdly, the search for a better life defined by economic parity and freedom from violence. This long-term study evidences the extended periods of Baka staying in one location when they feel at-ease, suggesting that particular social values guide Baka migratory movements, and highlighting the significance of the ‘social environment’ in conceptualising (Baka) migration. Furthermore, Baka sedentism, at least in northeastern Gabon, is shown to be more widespread and self-generated than previously assumed. 2017-06-20T12:41:58+02:00 PaleoMaps: SDI for open paleoenvironmental GIS data Paleoenvironmental studies and corresponding data are abundantly published and available in scientific records. However, paleoenvironmental data sets are comparatively rarely provided in GIS data formats. Here, we present an Open Science approach for collecting and creating GIS data, visualizing it in maps of paleoenvironments, and publishing them in a web-based Spatial Data Infrastructure (SDI), for access by the archaeology and paleoenvironment communities. The Open Science approach to the publication of data allows to properly cite the published data sets as bibliographic sources in research that builds upon these data sets. This paper has its focus on the implementation and setup of the Free and Open Source Software for Geospatial (FOSS4G)-based SDI, and on the workflow for compiling and publishing the GIS data. 2017-05-19T08:21:08+02:00 Neandertals or Early Modern Humans? A revised 14C chronology and geoarchaeological study of the Szeletian sequence in Szeleta Cave (Kom. Borsod-Abaúj-Zemplén) in Hungary Szeleta Cave near Miskolc (Hungary) is the eponymous site for the Szeletian technological group thought to reflect the last occurrence of Neanderthals in Central Europe. Because the Szeletian lithic industry contains both Middle Paleolithic and Upper Paleolithic elements, it is usually regarded as a “transitional” industry. As such, the development of a precise age model for the Szeletian would add substantial information to a period of population replacements in Europe. This concerns the timing of Neanderthal disappearance and their possible cohabitation with Anatomically Modern Humans in Central Europe. Previous age models for the Szeletian either suffered from deficiencies of dating methods and/or poor stratigraphic control of the dated samples. Therefore, population replacement models based on the key archaeological sequence of Szeleta Cave remain ambiguous. For this reason, we developed a new age model for the Szeletian sequence of this cave combined with a geoarchaeological investigation. Our new radiocarbon chronology, based on AMS 14C dating results of in situ bone and charcoal samples, lends support to the argument that the Szeletian does not represent a transition towards, but rather contemporaneity with the Early Upper Paleolithic. The Szeletian now appears to be of the same age as the early Aurignacian in the region which is linked to the early Anatomically Modern Humans. Consequently, Neanderthals are the likely authors of the famous Szeletian leaf points – bifacially shaped implements that are important cultural markers for the MP-UP transition. 2017-04-19T10:40:28+02:00 After the cold: Epigravettian hunter-gatherers in Blazi Cave (Albania) This paper presents the latest results of archaeological research in Epigravettian deposits of Blazi Cave in north-central Albania. This Epigravettian site is the first of its kind in Albania with a large sample of stone artifacts, faunal remains and dating material. The study material stems from the last remaining Late Pleistocene deposits in this cave and therefore characterizes the site in its totality. AMS 14C dates place the cultural layers between 18 and 17 ka cal. BP. This age model coupled with the density of anthropogenic remains attests an intensive use of the shelter by hunter-gatherers in the final phase of the Last Glacial Maximum. The radiocarbon results place the Blazi data into the early phase of the Late Adriatic Epigravettian complex. This chronology is corroborated by certain technological and typological traits identified within the stone tool sample. Analysis of the faunal remains suggests a repeated use of the shelter in the warmer summer period. Blazi Cave functioned as a specialized ibex hunting site and therefore fits into a larger complex of task localities in the wider region. 2017-04-19T08:37:41+02:00; Analyzing two-dimensional effects in central loop transient electromagnetic sounding data using a semi-synthetic tipper approach We present a simple and feasible approach to analyze and identify two dimensional (2D) effects in central loop transient electromagnetic (TEM) sounding data and the correspondingly derived quasi 2D conductivity models. The proposed strategy is particularly useful to minimize interpretation errors. It is based on the calculation of a semi-synthetic TEM-tipper at each sounding and for each observational transient time point. The semi-synthetic TEM-tipper is derived from the measured vertical component of the induced voltage UI;z and the synthetically calculated horizontal component UI;x. The approach is computationally in-expensive and involves one two-dimensional forward calculation of an obtained quasi 2D conductivity section. Based on a synthetic example we demonstrate that the TEM tipper approach is applicable to identify which transient data points and which corresponding zones in a derived quasi 2D subsurface model are affected by 2D inhomogeneities. The 1D inversion of such data leads to false models. An application of the semi-synthetic TEM tipper to field data from the Azraq basin in Jordan reveals that in total eight of 80 investigated soundings are affected by 2D structures although the field data can be fitted optimally using 1D inversion techniques. The largest semi synthetic tipper response occurs in a 300 m wide region around a strong lateral resistivity contrast. The approach is useful to analyze structural features in derived quasi 2D sections and to qualitatively investigate how these features affect the transient response. To avoid misinterpretation, these identified zones corresponding to large tipper values are excluded from the interpretation of a quasi 2D conductivity model. Based on the semi-synthetic study, we also demonstrate that a quantitative interpretation of the horizontal voltage response (e.g. by inversion) is usually not feasible as it requires the exact sensor position to be known. Although a tipper which is derived purely from field data is useful as a qualitative tool to identify 2D distortion effects, it is only feasible if the sensor setup is sufficiently accurate. Our proposed semi-synthetic TEM tipper approach is particularly feasible as an a-posteriori approach if no horizontal components are recorded or if the sensor setup in the field is not sufficiently accurate. 2017-04-12T12:31:28+02:00